package com.atguigu.gulimall.member.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

@Configuration
public class GuliFeignConfig {
    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor(){
        return new RequestInterceptor(){
            @Override
            public void apply(RequestTemplate requestTemplate) {
                //1、RequestContextHolder 拿到刚进来的这个请求
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();//RequestContextHolder：上下文环境的保持器,就是利用ThreadLocal一开始就放进去了
                if(attributes!=null){
                    System.out.println("Interceptor。。。"+Thread.currentThread().getId());
                    HttpServletRequest request = attributes.getRequest();//老请求
                    if(request != null){
//                    System.out.println("feign远程调用之前先进行RequestInterceptor.apply");
                        //同步请求头数据，主要是cookie
                        String cookie = request.getHeader("Cookie");
                        requestTemplate.header("Cookie",cookie);//给新请求同步了老请求的cookie
                    }
                }

            }
        };
    }
}
